Improvement in joints for sucker-rods



a. SHAW. JOINTS FOR STICKER-RODS.

Patent 6. Sept.18, 1877.

vlll m m a M MPEIERS. PHOTO UTHOGRA WASHINGTON u C U N TED STATES PATENTOFFICE.

JOHN SHAW, OF OIL CITY, PENNSYLVANIA.

IMPROVEMENT IN JOINTS FOR SUCKER-RODS.

Specification forming part of Letters Patent No. 195,408, datedSeptember 18, 1877; application filed August 20, 1877.

To all whom it may concern:

Be it known that I, JOHN SHAW, of Oil City, Venango county,Pennsylvania, have invented a new and useful Improvement in Joints forSucker-Rods, of which the following is a specification:

My invention relates to the sucker-rods of deep-well pumps; and theobject of my invention is to attach coupling-sockets to the severalsections of the rod in a substantial and permanent manner.

In the acompanying drawing, Figure l is a vertical section of myimproved couplingsocket for sucker-rods; Fig. 2, a transverse section onthe line 1 2, and Figs. 3, 4, 5, and 6, views of the detached parts ofthe device.

A represents one end of one section of the wooden sucker-rod, and isreduced in size and made cylindrical from the shoulder a to about thepoint b, whence to about the point c it is made tapering, and from thelatter point to the extreme end of the rod cylindrical. From the upperend of the socket B project two arms, f f, referred to hereinafter, andthe lower end of the socket has a hollow projection, G, a portion, 43,of which is made square, so as to be adapted to a wrench, the ends ofthe projection being threaded, so as to screw into theinternallythreaded end of the socket of an adjoining section of thesucker-rod. A hole, m, is bored into the end of the rod A, andlongitudinal slits are made in the rod from the extreme end to about thepoint e.

The rod Ais introduced into the socket B, the tapering portion of therod from b to c fitting snugly to the interior of the upper taperingportion of the socket, and the extreme end of the rod bearing on thebottom of the socket.

A pin, D, Fig. 5, forked at the end q, and

made tapering at the opposite end, 1), is introduced through the hollowprojection G of the socket into the hole m in the end of the rod, and isdriven tightly into the same, the result of which will be the outwardforcing of the split end of the rod against the taperin ginterior of thelower portion of the socket by the tapering portion of the pin, theoutward spreading of the prongs of the forked end of the pin, and theconsequent retention of the latter, and the permanent attachment of thewooden rod to the socket.

In order to strengthen the rod, the arms ff of the socket are made toembrace the cylindrical portion A by a hoop, h, as best observed in Fig.2.

It should be understood that the suckerrods of deep-well pumps are madein sections or lengths coupled together, and that each end of eachsection is to have one of the sockets B, the socket at one end of eachsection having an externally-threaded projection, j, and the socket atthe opposite end of the same section having an internally-threadedrecess, so that the several sections of the rod may be readily screwedtogether and as readily uncoupled.

I claim as my invention- The socket B, contracted at e, and having ahollow projection, G, the rod A, adapted to the socket and severed atthe end, as specified, and the taper pin D, all being combinedsubstantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

I JOHN SHAW.

Witnesses:

ROBERT DERBY, J. F. WALTERS.

